The 100k potentiometers set the voltage level reaching the Op Amps. A dual ganged 100K-Ohm audio-taper potentiometer should be used over a linear taper or potentiometer. In some cases the component may be called a ganged stereo taper. The schematic does not show pin numbers for the Op Amps because the circuit works for either a single or dual package
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Op Amp and of course a large number of different Op Amps. However to the right, some different pin numbering is shown. Note that [although not shown well] the two potentiometers are ganged together, one knob changes both potentiometers at the same time. So although each channel uses a different potentiometer they both move up or down at the same time producing a volume control. A separate balance control could also be added to change the volume of one channel, while reducing the other. Or a separate potentiometer could be added into each channel so that each channel would be adjusted up or down, with regard to the other. The amplifier could be constructed of either two individual Opamps or a package containing two Op Amps. The 741 is an example of a common Opamp having a single device within the package. Another common example would be a TL082 which is a component with two separate devices within the same package. The pin functions for both devices are shown the the right. Having two devices in the same package saves parts and and cost. However power dissipation is reduced by having two semiconductors operating in the same package, so a dual op-amp package may not be the way to go. Regardless of the Op Amp used or the number of devices in a package, always bypass the power pin Vcc [Vs, V+] to ground using a. 01uF capacitor [at a minimum]. Bypass capacitors are not shown in many of these schematic diagrams to make them less...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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